This header was originally in the C standard library as <fenv.h>.
This header is part of the floating-point environment library.
Types
fenv_t | The type representing the entire floating-point environment |
fexcept_t | The type representing all floating-point status flags collectively |
Functions
| (C++11) | clears the specified floating-point status flags (function) |
| (C++11) | determines which of the specified floating-point status flags are set (function) |
| (C++11) | raises the specified floating-point exceptions (function) |
| (C++11)(C++11) | copies the state of the specified floating-point status flags from or to the floating-point environment (function) |
| (C++11)(C++11) | gets or sets rounding direction (function) |
| (C++11) | saves or restores the current floating point environment (function) |
| (C++11) | saves the environment, clears all status flags and ignores all future errors (function) |
| (C++11) | restores the floating-point environment and raises the previously raise exceptions (function) |
Macros
| floating-point exceptions (macro constant) | |
| floating-point rounding direction (macro constant) | |
| (C++11) | default floating-point environment (macro constant) |
Synopsis
namespace std {
// types
typedef /*object type*/ fenv_t;
typedef /*integer type*/ fexcept_t;
// functions
int feclearexcept(int except);
int fegetexceptflag(fexcept_t *pflag, int except);
int feraiseexcept(int except);
int fesetexceptflag(const fexcept_t *pflag, int except);
int fetestexcept(int except);
int fegetround(void);
int fesetround(int mode);
int fegetenv(fenv_t *penv);
int feholdexcept(fenv_t *penv);
int fesetenv(const fenv_t *penv);
int feupdateenv(const fenv_t *penv);
}
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